ST Life.augmented


12 V/12 W wide range non-isolated flyback based on the VIPER26LN
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The STEVAL-ISA110V1 demonstration board is a 12 V-1 A power supply set in non-isolated flyback topology using the VIPER26LN, a new offline high-voltage converter by STMicroelectronics.

The features of the device include an 800 V avalanche-rugged power section, PWM operation at 60 kHz with frequency jittering for lower EMI, current limiting with adjustable set point, onboard soft-start, a safe auto-restart after a fault condition, and low standby power.

Protection features include thermal shutdown with hysteresis, delayed overload protection, and open loop failure protection.

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Data Brief

Key Features

  • Universal input mains range:
  • input voltage 90 - 264 VAC
  • frequency 45 - 65 Hz
  • Single output voltage: 12 V @ 1 A continuous operation
  • Standby mains consumption: < 30 mW @ 265 VAC
  • Average efficiency: > 85%
  • Fully protected against faults (overload, feedback disconnection and overheating)
  • EMI: according to EN55022-Class-B


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1870: 12 V/12 W wide-range non-isolated flyback based on the VIPER26LN
1.0 1,045 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
STEVAL-ISA110V1 gerber files
1.0 90 KB

Bill of Materials

Description Version Size
2.0 100 KB

Schematic Pack

Description Version Size
STEVAL-ISA110V1 schematics
1.0 143 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ISA110V1ActiveVIPER26LNBuy Direct100.45Distributor reported inventory date: 2016-02-08
Distributor NameRegionStockMin. order

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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